update files to conform to new mypy standard #15384

Job	Run time
Format check	13s
Misc check	11s
Lint check	2m 40s
Type check	1m 23s
Doc test	1m 54s
Changed files test	1m 26s
Notebook formatting	13s
Packaging test	1m 14s
Shell check	8s
Build protos	11s
Coverage check	9m 47s
Isolated pytest Ubuntu	6m 54s
Pytest MacOS (3.10)	7m 54s
Notebook Tests against PR	9m 4s
Pytest MacOS (3.11)	4m 42s
Pytest MacOS (3.12)	10m 2s
Changed Notebooks Isolated Test against Cirq stable (partition-0)	1m 1s
Check consistency of requirements	17s
Changed Notebooks Isolated Test against Cirq stable (partition-1)	47s
Pytest Ubuntu (3.10)	5m 48s
Changed Notebooks Isolated Test against Cirq stable (partition-2)	1m 3s
Pytest Ubuntu (3.11)	5m 23s
Bundle file consistency	45s
Changed Notebooks Isolated Test against Cirq stable (partition-3)	49s
Pytest Ubuntu (3.12)	5m 40s
Typescript tests coverage	36s
Typescript tests	37s
Typescript lint check	34s
Pytest Windows (3.10)	7m 26s
Pytest Windows (3.11)	10m 51s
Pytest Windows (3.12)	11m 6s
	1h 50m 39s

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